Sempron 2650 vs Athlon II X4 645

Primary details

Comparing Athlon II X4 645 and Sempron 2650 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2152	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.30	no data
Market segment	Desktop processor	Desktop processor
Power efficiency	1.47	no data
Architecture codename	Propus (2009−2011)	Kabini (2013−2014)
Release date	21 September 2010 (14 years ago)	9 April 2014 (10 years ago)
Launch price (MSRP)	$80	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Athlon II X4 645 and Sempron 2650 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	4 (Quad-Core)	2 (Dual-core)
Threads	4	2
Base clock speed	3.1 GHz	no data
Boost clock speed	3.1 GHz	1.45 GHz
L1 cache	128 KB (per core)	128 KB
L2 cache	512 KB (per core)	1024 KB
L3 cache	0 KB	no data
Chip lithography	45 nm	28 nm
Die size	169 mm2	107 mm2
Maximum core temperature	no data	90 °C
Maximum case temperature (TCase)	no data	90 °C
Number of transistors	300 million	no data
64 bit support	+	+
Windows 11 compatibility	-	no data

Compatibility

Information on Athlon II X4 645 and Sempron 2650 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1	1
Socket	AM3	AM1
Power consumption (TDP)	95 Watt	25 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Athlon II X4 645 and Sempron 2650. You'll probably need this information if you require some particular technology.

AES-NI	-	+
FMA	-	FMA4
AVX	-	+
PowerNow	-	+
PowerGating	-	+
VirusProtect	-	+

Virtualization technologies

Virtual machine speed-up technologies supported by Athlon II X4 645 and Sempron 2650 are enumerated here.

AMD-V	-	+
IOMMU 2.0	-	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Athlon II X4 645 and Sempron 2650. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3-1333
Max memory channels	no data	1

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	AMD Radeon R3 Graphics
Number of pipelines	no data	128
Enduro	-	+
Switchable graphics	-	+
UVD	-	+
VCE	-	+

Graphics interfaces

Available interfaces and connections of Athlon II X4 645 and Sempron 2650 integrated GPUs.

DisplayPort	-	+
HDMI	-	+

Graphics API support

APIs supported by Athlon II X4 645 and Sempron 2650 integrated GPUs, sometimes API versions are included.

DirectX	no data	DirectX® 12
Vulkan	-	+

Peripherals

Specifications and connection of peripherals supported by Athlon II X4 645 and Sempron 2650.

PCIe version	2.0	2.0
PCI Express lanes	no data	4

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Pros & cons summary

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Recency	21 September 2010	9 April 2014
Physical cores	4	2
Threads	4	2
Chip lithography	45 nm	28 nm
Power consumption (TDP)	95 Watt	25 Watt

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Should you still have questions on choice between Athlon II X4 645 and Sempron 2650, ask them in Comments section, and we shall answer.

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